What this means
The IEEE assigned the MA-L block 5805D9 to Seiko Epson Corporation. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 58:05:D9, it is Seiko Epson Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 5805D9?
5805D9 is registered to Seiko Epson Corporation in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Seiko Epson Corporation's block covers 16,777,216 addresses.
What devices use 5805D9?
Any network device with a MAC address starting 58:05:D9 was manufactured by or for Seiko Epson Corporation.